WPF RadGridView: Can I customize the Row Indicator to function more like Excel's row indicator?

[Patrick]

Hello,

I would like to know if there is a way to customize (or alter) the RadGridView-Row Indicator to function more like the row indicator in Excel that supports Selection of rows and Automatic Row Numeration?

Or perhaps any way to set a Custom Row Indicator in a Custom RadGridView?

 

thank you,

Patrick

 

[Dilyan Traykov]

Hello Patrick,

Rather than customize the default indicator, what I can suggest is to try an approach similar to the one demonstrated in the Row Number demo from our WPF Controls Samples application.

In other words - to use a custom column, in which you can display a custom element (such as TextBlock) and calculate the index of the items as well as add custom logic (such as selection of the row upon click).

    public class MyColumn : Telerik.Windows.Controls.GridViewColumn
    {
        public override FrameworkElement CreateCellElement(Telerik.Windows.Controls.GridView.GridViewCell cell, object dataItem)
        {
            TextBlock textBlock = cell.Content as TextBlock;

            if (textBlock == null)
            {
                textBlock = new TextBlock();
            }

            textBlock.Text = string.Format("{0}", this.DataControl.Items.IndexOf(dataItem) + 1);

            return textBlock;
        }

        protected override void OnPropertyChanged(System.ComponentModel.PropertyChangedEventArgs args)
        {
            base.OnPropertyChanged(args);

            if (args.PropertyName == "DataControl")
            {
                if (this.DataControl != null && this.DataControl.Items != null)
                {
                    this.DataControl.Items.CollectionChanged += (s, e) =>
                    {
                        if (e.Action == System.Collections.Specialized.NotifyCollectionChangedAction.Remove)
                        {
                            this.Refresh();
                        }
                    };
                }
            }
        }
    }

In addition, you'd need to hide the default indicator by setting the RowIndicatorVisibility property to Collapsed.

Please give this a try and let me know if such an approach would work for you.

Regards,
Dilyan Traykov
Progress Telerik

[Patrick]

Hello Dilyan,

I'm pleased to say your solution worked as intended and did indeed answer my previous question.

However, I would like to know if there's any modifications I can make that would allow column filtering discrimination?

Currently when I filter a certain column, the row number stays the same even when the underlying data item is different.

I was hoping that the Row Number is correlated with the data items being filtering (with out adding a property to the underlying ItemsSource data items).

 

Thank you,

Patrick.

[Dilyan Traykov]

Hello Patrick,

I'm happy to hear that the proposed solution worked for you.

I could not, however, infer what you mean by "column filtering discrimination", can you please elaborate on this?

I tested the behavior you described with the Row Number demo I referenced earlier, however, the numbers are updated as expected at my end upon filtering:

Can you please specify whether this differs from the behavior you observe at your end? If that is the case, please send over a small sample project which demonstrates your setup and the issue you observe and I will gladly assist you further.